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-oriented single-crystal β-Ga2O3 substrate to study the mechanical properties of the material. The anisotropy of the mechanical properties was examined, especially with regard to the dependence of the elastic modulus (E), hardness (H), and form of plastic deformation on the rotation angle of a Berkovich indenter with respect to the monoclinic structure. E re...
Continue readingBovine lactoferrin (bLF) is widely known as an iron-binding glycoprotein from the transferrin family. The bLF molecule exhibits a broad spectrum of biological activity, including iron delivery, antimicrobial, antiviral, immunomodulatory, antioxidant, antitumor, and prebiotic functions, thereby making it one of the most valuable representatives for biomedical applic...
Continue readingProton conductors are attractive materials with a wide range of potential applications such as proton-conducting fuel cells (PCFCs). The conventional strategy to enhance the proton conductivity is acceptor doping into oxides without oxygen vacancies. However, the acceptor doping results in proton trapping near dopants, leading to the high apparent activation ener...
Continue readingLithium-ion batteries (LIBs) to power electric vehicles play an increasingly important role in the transition to a carbon neutral transportation system. However, at present the chemistry of LIBs requires, among other elements, cobalt (Co), which will probably become scarce over time in addition to posing supply chain risks related to its single source, human righ...
Continue readingTransport electrification and grid storage hinge largely on fast-charging capabilities of Li- and Na-ion batteries, but anodes such as graphite with plating issues drive the scientific focus towards anodes with slopped storage potentials. Here we report fast charging of ampere-hour-level full Na-ion batteries within about 9 minutes for continuous 3,000 cyc...
Continue readingThis study aimed to intercalate manganese (Mn) and cobalt (Co) ions in molybdenum disulfide (MoS2) to synthesize Mn-Co-MoS2 compounds using a simple one-step hydrothermal process. Surface morphologies, material properties, and electrochemical characteristics of the synthesized Mn-MoS2, Co-MoS2, and Mn-Co-MoS2 compounds were investigated. The Mn-Co-MoS2 electrode ...
Continue readingTiO2 anatase, which exhibits the highest catalytic performance, transforms to rutile at 800 K. To inhibit the transition of anatase to rutile, several strategies, such as metal and/or non-metal doping, oxygen enrichment, and surface coating, have been studied, resulting in stable anatase within 773–1273 K. However, highly stable anatase without dopants is sti...
Continue readingNonthermal plasma activation of light alkanes is an encouraging decarbonization strategy to produce chemicals or fuels from abundant and/or flared carbon sources. However, prolific carbon growth on both the catalyst and electrode has limited its practicality, requiring additional knowledge of the carbon structure and growth mechanism before breakthroughs are realiz...
Continue readingTwo ferrite series were synthesized. One series has nanosize samples that have been prepared by the co-precipitation method, and the second series has the corresponding bulk samples that have been sintered at 1000 °C for 6 h. X-ray diffraction has been used to estimate the cubic spinel structure of both series. The crystallite size, theoretical density, and p...
Continue readingElectron donor–acceptor (DA)-type metal–organic frameworks (MOFs) with valence instability are promising molecular materials for the design of photo-responsive and electronic/magnetic functional materials. Here, ultrafast photoinduced dynamics in a DA-type layered MOF that exhibits a charge-transfer (CT)-type phase transition are reported: (NPr4)2[Fe2(C...
Continue readingPorous carbons with large pore volumes and surface areas provide high performance in gas separation, water purification, and storage. Carbon composites comprising nanocarbons can offer uniform pore structures with unique adsorption properties. In this work, we prepared fullerene-pillared porous graphene by bottom-up processing and demonstrated its water vapor adsor...
Continue readingLocalized high-concentration electrolytes (LHCEs), which are mixtures of highly concentrated electrolytes (HCEs) and non-coordinating diluents, have attracted significant interest as promising liquid electrolytes for next-generation Li secondary batteries, owing to their various beneficial properties both in the bulk and at the electrode/electrolyte interface. We p...
Continue readingA novel tungsten disulfide-molybdenum copper oxide composite supported with graphene quantum dots (WM@GQDs) has been synthesized as a counter electrode (CE) for dye-sensitized solar cells (DSSCs) using a simple and low-cost ultrasonication method. The unique structure of WM@GQDs exhibits excellent power conversion efficiency due to its high catalytic activity and...
Continue readingThe chemical order and disorder of solids have a decisive influence on the material properties. There are numerous materials exhibiting chemical order/disorder of atoms with similar X-ray atomic scattering factors and similar neutron scattering lengths. It is difficult to investigate such order/disorder hidden in the data obtained from conventional diffraction me...
Continue readingThe local structure of BaTiO3 perovskite has been investigated for studying phase transitions by several groups. While it has been shown that H– doping into BaTiO3 changes its long-range average crystal symmetry from tetragonal to cubic, factors contributing to the structural change have not been fully understood. In this work, we investigated the dependence ...
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